Electrical Supply and Population.

Currently a household of, say 5 persons, gets about 3 hp = 600 hp per thousand population. My answer is 100 hp for a.

In a historical context "horsepower"  has at least three different possible meanings. Each with several possibilities as to exactly what is being measured or estimated.


1) The connected horsepower of electric motors for driving machinery etc. Excluding heating, lighting and other uses. Can only be an estimate, they cant count every last one, and what about duty/standby pairs ? count one only or both.

2)  The total  load  expressed in horsepower rather than in kilowatts. Might mean total installed, or might mean typical peak, or might mean highest ever achieved under exceptional conditions.

3)  The total horsepower of the steam engines that drive the generating plant. Probably with an estimate for any power purchased from another company. Might mean maximum used at any one time. Or might mean total installed, including spare capacity.


And any of the above could be gross generated power as measured at the generator terminals, or total "power sent out" after deducting that consumed within the power station. Or "power sold to consumers" which was power sent out, less losses in mains, abstraction, substation losses, and perhaps metering losses.

Clue. New York. Pop 3.73 millions. Power and light 52.6      Power only 13.9.


Z.

Power and light 52.6      Power only 13.9.


Units?

Bananas?


Regards


BOD

And there is "indicated horsepower" as well which does not correspond to either of the above.

And "nominal horsepower" for steam road vehicles, this is calculated from boiler pressure and cylinder size and bears little relationship to actual horsepower.


There is something to be said for kilowatts !

Then there is the power that one horse can manage; this is in the region of 10 HP as long as its not for long durations.

Answer from the "Practical Engineer" Electrical Pocket Book and Diary 1910.


London pop. 6.56 millions. All purposes 48 horse power per 1,000. Power only 5.4.


     London Industrial Area.  pop. 3.8 millions. All purposes 25.8.  Power only 4.8.


These figures show horse power connected to the supply mains per 1,000 head of population.


Bod wins as he was closest.


Z.